Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
ON THE TRACK, “LENINGRAD-2”
Several years ago I came across a photograph of an unfamiliar race car. Machine interested, but no additional information about the photo caption does not contain, and the search for...
AND A BACKPACK AND SHOPPING BAG
If you ask someone what a tourist is different from the ordinary pedestrian, the answer, apparently, is simple: a backpack. Indeed, it is a necessary accessory camping gear, and the...
